Good morning.  I have a Honda GCV 160 self-propelled 21" lawn mower that I purchased 4 years ago.  Today while mowing it stopped cold.  It did not sputter or run rough before it died.  I have used Tru Fuel 4-Cycle fuel since I purchased it and I change the oil and spark plug each year and it has always started with 1-2 pulls.  I haven't changed the air filter for a couple of years.  I just pull it out to knock the dust off and blow on it.  The engine will not start at all when I pull the cord, which pulls normally.  It does not even attempt to start.  Any thoughts on possible causes?  Thanks.
	
		
			
		
		
	
			
			 
				